You can't use CONVERT_EXPR to convert between two class types, and it was
breaking copy elision.
Unfortunately, this patch breaks symmetric-transfer-00-basic.C, where
susp_type is Loopy<int>::handle_type. How is this supposed to work?
gcc/cp/ChangeLog:
* coroutines.cc (expand_one_await_expression): Change conversion
to assert.
---
gcc/cp/coroutines.cc | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/gcc/cp/coroutines.cc b/gcc/cp/coroutines.cc
index eca01abcb7a..568f2edf67d 100644
--- a/gcc/cp/coroutines.cc
+++ b/gcc/cp/coroutines.cc
@@ -1728,7 +1728,9 @@ expand_one_await_expression (tree *stmt, tree
*await_expr, void *d)
}
else
{
- r = build1_loc (loc, CONVERT_EXPR, void_coro_handle_type, suspend);
+ gcc_checking_assert (same_type_ignoring_top_level_qualifiers_p
+ (void_coro_handle_type, susp_type));
+ r = suspend;
r = build2_loc (loc, INIT_EXPR, void_coro_handle_type, data->conthand,
r);
r = build1 (CONVERT_EXPR, void_type_node, r);
append_to_statement_list (r, &body_list);
base-commit: 43faf3e5445b571731e52faa1be085ecd0a09323
--
2.31.1
